The Curse of Mars also applies to Asian countries. About two-thirds of the attempted missions to Mars have failed, many of them even before leaving Earth's orbit, and most of the rest when they tried to land. Japan's only Mars mission failed in 1998; China's first try failed when the Russian rocket carrying its Mars orbiter into space fell back to Earth in 2011 - and so India seized the opportunity to be the first Asian country to go to Mars.

Fifteen months after the decision was announced by Prime Minister Manmohan Singh in an Independence Day speech from the Red Fort in Delhi, India's half-tonne Mangalyaan vehicle is ready to be sent off to the red planet. Unless the Mars Curse gets it, by the time you read this it will be in orbit, boosted there by an Indian rocket, and within two weeks it will set course for Mars.

There is something faintly ridiculous about India and China "racing" to be the first Asian country to reach Mars, but it's no more ridiculous than the Russian-American space race of the 1960s.

Besides, to be fair to the Indian Space Research Organisation, the launch window for making a relatively low-energy transition to a Mars orbit will close before the end of this month, and it won't open again for more than two years.

The Indian space programme operates on an amazingly small budget (about $1 billion a year), but it has put dozens of satellites in orbit that provide practical benefits for earthbound Indians: remote sensing, flood management, cyclone alerts, fishery and forest management. But that's all in near space; the question is really whether long-range space exploration is a rational proposition.

Nationalism is part of the motivation behind every country's space programme, and though it has its comical side it does at least persuade the political authorities to provide the large sums needed. China is planning to land a rover on the moon next month, and talking about a manned landing by 2024. That will certainly speed up India's manned space programme.

Like the old Russo-American space race, the Chinese-Indian one will accelerate the development of new technologies and techniques. It will fill some of the gap left by the loss of momentum in the older space powers. But the biggest reason for welcoming the entry of major new players is the one that everybody is too embarrassed to mention: the future of the human race.

Well, almost everyone. Elon Musk, founder and chief executive of SpaceX, the private company that aims to dominate the delivery- to-orbit service once provided by Nasa, actually wants to create a human colony on Mars in his lifetime - he's 41.

He is a serious player, whose large fortune (derived from his creation and subsequent sale of PayPal) is now devoted to manufacturing electric cars and building space transportation systems. Both projects are prospering, and he sees them as providing the financial and technological basis for pursuing his real goal: spreading human beings beyond this single planetary habitat while the launch window for that is still open.

Musk was quite frank about that in an interview with Rory Carroll in the Guardian newspaper last July. "The lessons of history suggest that civilisations move in cycles," he said. "You can track that back quite far - the Babylonians, the Sumerians. We're in a very upward cycle right now, and hopefully that remains the case. But it might not.

"There could be some series of events that cause that technology level to decline. Given that this is the first time in 4.5 billion years where it's been possible for humanity to extend life beyond Earth, it seems like we'd be wise to act while the window was open and not count on the fact that it will be open a long time."

I'll let you in on a little secret. That is a big part of the motivation (though a rarely admitted part) for half the people who work in any of the national space programmes, including India's. They value the science, and they may even revel in the glory from time to time, but that's what it's really about.

Gwynne Dyer is an independent journalist whose articles are published in 45 countries.